Umiri Yahata is the stoic bassist of Ave Mujica, stage name Timoris, voiced by Mei Okada. A first-year at Hanasakigawa Girls' Academy and close friend of Taki Shiina, she works as a session musician for numerous bands, maintaining professionalism and emotional distance in Ave Mujica, viewing it as one gig among many. Her distant behavior stems from her first band abandoning her after she meddled, believing she was helping. Described as having a strong poker face and taskmaster style, she wants to be trustworthy. She has a unique blunt personality and speaking style.